<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var user={
            username:"alice",
            age:20,
            sex:"男"
        };

        //将数据存储到localStorage

        var str=JSON.stringify(user);
        localStorage.setItem("user",str);

       
    </script>
</body>
</html>